A desktop computer is a personal computer in a form intended for regular use at a single location, as opposed to a mobile laptop or portable computer. Prior to the wide spread of microprocessors, a computer that could fit on a desk was considered remarkably small.
Desktop computers come in a variety of types ranging from large vertical tower cases to small form factor models that can be tucked behind an LCD monitor. “Desktop” can also indicate a horizontally-oriented computer case usually intended to have the display screen placed on top to save space on the desk top.
Most modern desktop computers have separate screens and keyboards. Tower cases are desktop cases in the earlier sense, though not in the latter. Cases intended for home theater PC systems are usually considered to be desktop cases in both senses, regardless of orientation and placement.
Desktops have the advantage over laptops that the spare parts and extensions tend to be standardized, resulting in lower prices and greater availability. For example, the form factor of the motherboard is standardized, like the ATX form factor.
Desktops have several standardized expansion slots, like Conventional PCI or PCI express, while laptops only tend to have one mini PCI slot and one PC card slot (or Express Card slot). This means that a desktop can be customized and upgraded to a greater extent than laptops.
Another advantage of desktop is, that power consumption is not as critical as in laptop computers because the desktop is powered from the wall socket. Desktop computers also provides more space for heat to escape. The two large microprocessor manufacturers Intel and AMD develop special CPUs for mobile computers that consume less power and lower heat, but with lower performance levels.
In conclusion you can save a lot just buying a Desktop Computer and buying a Refurbished one is even a better solution! Why? Since it is so easy to change parts and upgrading a PC, you can buy more parts and upgrade over the time, considering that the Refurbished products prices are so low!